The merchant lower cost by 10% in December when it was not sold. Again in January lower cost by 20% and now costs 576 €.
A. How much the goods stood originally?
B, how much cost the goods after the first lowering?
C, How many percents totally merchant lower cost?

Correct result:

a =  800 EUR
b =  720 EUR
c =  28 %


 a (110/100) (120/100)=576  72a=57600  a=800=800 EUR
b=a (110/100)=800 (110/100)=720 EUR
c=100 a576a=100 800576800=28%

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